#pragma once

#include <iostream>
#include <string>
#include <cstdlib>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <strings.h>

#include "Log.hpp"
#include "Common.hpp"
#include "InetAddr.hpp"

namespace SocketModule
{
    using namespace LogModule;
    class Socket;
    // 模板方法模式

    using SockPtr = std::shared_ptr<Socket>;
    // 基类, 规定创建套接字的方法
    class Socket
    {
    public:
        virtual ~Socket() = default;
        virtual void SocketOrDie() = 0;
        virtual int SetSocketOpt() = 0;
        virtual bool BindOrDie(int port) = 0;
        virtual bool ListenOrDie() = 0;
        virtual int Accepter(InetAddr* client) = 0;
        virtual void Close() = 0;
        virtual int Recv(std::string* out) = 0;
        virtual int Send(const std::string& in) = 0;
        virtual int Fd() = 0;

        // 其他方法,需要时再加

        // 提供一个创建listensockfd的固定实现
        void BuildTcpSocket(int port)
        {
            SocketOrDie();
            SetSocketOpt();
            BindOrDie(port);
            ListenOrDie();
        }
    };


    class TcpSocket : public Socket
    {
    public:
        TcpSocket():_sockfd(gdefaultsockfd)
        {

        }
        TcpSocket(int sockfd):_sockfd(sockfd)
        {

        }
        virtual ~TcpSocket()
        {
        }
        virtual void SocketOrDie() override
        {
            _sockfd = ::socket(AF_INET, SOCK_STREAM, 0);
            if (_sockfd < 0)
            {
                LOG(LogLevel::ERROR) << "socket error";
                exit(SOCKET_ERR);
            }
            LOG(LogLevel::DEBUG) << "socket create success: " << _sockfd;
        }
        virtual int SetSocketOpt()override
        {
            //保证我们服务器在异常断开的时候,可以立即重启,不会有bind问题
            int opt = 1;
            int n = ::setsockopt(_sockfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
            (void)n;
            return n;
        }
        virtual bool BindOrDie(int port)override
        {
            if(_sockfd == gdefaultsockfd)
            {
                return false;
            }
            InetAddr addr(port);
            int n = ::bind(_sockfd,addr.NetAddr(),addr.NetAddrLen());
            if(n < 0)
            {
                LOG(LogLevel::ERROR) << "bind error";
                exit(BIND_ERR);
            }
            LOG(LogLevel::DEBUG) << "bind create success: " << _sockfd;
            return true;
        }
        virtual bool ListenOrDie()override
        {
            if(_sockfd == gdefaultsockfd)
            {
                return false;
            }
            int n = ::listen(_sockfd,gbacklog);
            if(n < 0)
            {
                LOG(LogLevel::ERROR) << "listen error";
                exit(LISTEN_ERR);
            }
            LOG(LogLevel::DEBUG) << "listen create success: " << _sockfd;
            return true;
        }
        //1.文件描述符 2.client info
        int Accepter(InetAddr* client)override
        {
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);
            int newsockfd = ::accept(_sockfd,CONV(&peer),&len);
            if(newsockfd < 0)
            {
                LOG(LogLevel::ERROR) << "accept error";
                return -1;
            }
            client->SetAddr(peer,len);
            return newsockfd;
        }
        virtual void Close()override
        {
            if(_sockfd == gdefaultsockfd)
            {
                return ;
            }
            ::close(_sockfd);
        }
        virtual int Recv(std::string* out)override
        {
            char buffer[1024];
            auto size = ::recv(_sockfd,buffer,sizeof(buffer)-1,0);
            if(size > 0)
            {
                buffer[size] = 0;
                *out = buffer;
            }
            return size;
        }
        virtual int Send(const std::string& in)override
        {
            auto size = ::send(_sockfd,in.c_str(),in.size(),0);
            return size;
        }
        virtual int Fd()override
        {
            return _sockfd;
        }

    private:
        int _sockfd;
    };

    // //for test
    // int main()
    // {
    //     Socket* sk = new TcpSocket();
    //     sk->BuildTcpSocket(8080);
    // }
}



